The Beretta
MX4 is a selective fire version of the CX4 Storm pistol. This
submachine gun was first announced in 2011. This weapon
has got an unusual appearance. It is aimed at law enforcement
forces. In 2014 a small number of these submachine guns were
delivered to Italian Navy. India reportedly ordered 34 500 Beretta
MX4 submachine guns for its Ministry of Home Affairs forces.

This Italian
submachine gun is based on the CX4 Storm pistol, which was
originally developed for law enforcement forces and civil customers.
However the MX4 has an added fully-automatic firing mode. It has the
same blowback-operated action. This weapon is chambered
for a standard 9x19 mm Parabellum ammunition. Despite its unusual
appearance the MX4 Storm is simple to use and comfortable to handle.
Its furniture is made of robust polymer materials.

This weapon
has got ambidextrous controls. An ambidextrous safety and fire mode
selector button is located over the pistol grip. It has 3 positions
for "safe", "semi-auto", and "full-auto" modes. There is also a
firing pin block safety. A charging handle can be installed on
either side of the receiver. Spent cases can be also ejected to
either side of the receiver. This submachine gun has a loaded
chamber indicator.

This
submachine gun has a last shot bolt hold. After the last round from
the magazine has been fired, the bolt remains in opened position.
This feature speeds up reloading of the weapon.

The Beretta
MX4 Storm can be easily field stripped into a couple of mayor
components.

This weapon
is fed from 30-round capacity magazines. It is also compatible with
Beretta's pistol magazines with 15-, 17-, and 20-round capacity.
Magazines are housed inside the pistol grip. Magazine release button
is located in the pistol grip.

Unlike most
modern submachine guns the Beretta MX4 Storm lacks a side-folding
stock. Instead it comes with integral buttstock, which can not be
removed.

This weapon
has got simple iron sights. The rear sight has adjustments for 50
and 100 meters. This submachine gun comes as standard with
Picatinny-type scope rail and can mount various red dot sights. It
is claimed that with the sight fitted this weapon is fairly accurate
out to a range of 100 meters.

Optional
add-on accessory rails can be installed on the foregrip. This
submachine gun can mount various add-on accessories, such as
vertical grips, tactical flashlights or laser pointers. Barrel's
muzzle is threaded and can mount a sound suppressor.